Work-holder for sewing-machines.



0. E. BROWN.

WORK HOLDER FORSEWING MACHINES.

APPLICATION FILED SEPT.-27. 19H- Patented Apr..20,' 1915.

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WITNESSES.

0. E. BROWN. WORK HOLDER FOB SEWING MACHINES.

APPLICATION FILED SEPT-27,19ll,

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citizen of the United States,

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one 1:. BROWN, or naocxronemssncnosnrrs, nssrenon r THE smena wrauurncru'ame comraur, a CORPORATION or new JERSEY.

'WQRK-HOLDER IEOR SEWING-MACHINES.

To all whom it may concern Be it known that I, OTIS E. BROWN, a residing at Brockton, in the county of Plymouth and 'State of Massachusetts, have invented certain new and useful Improvements in Work- Holders for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an improvement in machinesdesigned for stitching together ends 0 various receptacles formed espeeially from pieces of leather, such' as cycle to'olcases, knapsacks, cartridgeboxes and'fieldglass cases. In the construction of such re- I ceptacles, the pieces of material constituting thesides and ends of the same,

with substantially fiat faces in. angular rewh'en formed lation, are fastened upon awooden block or last with the junction of their adjacent edges at the required angle and are presented to the stitch-forming mechanism with such both faces disposed at an an is with the needle, so thatthe fastening stltehes .pass' through Rieces of material at their It has for its further object to adapt the work-holding means for presenting the work in-diflerent angular relations to the needle for application of the stitches 'at the required inclination with the faces .of the material to correspond with the relative thicknesses of the pieces of material whose edges are to be secured together.

While the present improvement is not limited to any type or class of sew 1ng machine, it is preferably applied to a needlefeed sewing machine of the type represented in my United States'Patent No. 1,002,217,

dated September 5, 1911. In its preferred form, the work-holder comprises a work- 'rispecification of Letters Patent.

, plate junction in a direction inclined to both of such faces.

Patented Apr. 20,1915. Serial No. 651,555.

pivotally connected with the frame of the machine and provided with adjustable means for maintaining it in acute-angular relation with the needle, combined with a resser-foot pivotally mounted thereon and movable in a direction substantially-parallel with the face of the same. The usual spring-pressed presser-barof the machine is adapted to rest upon suchpresser-foot and to force it into operative engagement with 50118 fade of h receetacle to be stitch d the angularly p s' g sef the sidesand "In the accompanying drawings, Figure l is a side elevation of asewing machine provided with a work-holder constructed in accordance with the present mvention, and F ig..

2 a front end View of the same. ,Fig. 3 is a detached side elevation of the work-holder showing in operative position one of the thrust-sustaining members which is represented in the preceding figuresin its retracted inoperative position, and Fig. 3 is 'a detail view showing the adjusting means for the work-holder framm.

support and the resser-foot mounted there on. Fig. 5 is a front end view of the presser-foot and Fig. 6 a perspective view of the same vlewed from the upper side.

Fig. 4 is a detached perspective View of a portion of the work- As represented in the drawings, the frame 7 of the machine comprises the hollow standard 1 with cylindrieal work-supporting arm or horn 2 and hollow overhanging bracketarm 3 terminating in the usual head 4. The needle 5 is mounted in the vertically reciprocating needle-bar (3 journaled in the hearing. bosses 7- of the laterallyjogging needleframe8.

The needle-frame is provided at one side with the split boss 9 in which is mounted the stud 10 slidingl-y sustained in a trans verse runway .of the frame as described in feed-lever 19 is in practice formed intermediate its ends with a longitudinal guideway 25 entered by movable fulcrum-pins 26 carried by a transverse feed-adjusting lever 27. By means of the feed-actuating'mechanism just described, the needle-frame receives lateral jogging movements crosswise of the horn 2 which are transmitted to the needle while in the work, by means of which the latter is advanced to space the stitches.

A suitable loop-taker is provided to coiip' erate with the needle in the .production of stitches, and in the present machine is in the form of an oscillating shuttle mounted in the race 28 secured to the forward end of the work-supporting arm 2. r T

The forward portion of the arm or horn 2 is shown formed with an enlargement 29 provided upon its upper side with a divided clamp-lug 30 in which is secured'by means of the clamp-screws 31 the flat bar 32 provided at its forward end with the cross-bar 33 having sockets in its extremities to receive the conical points of the bearing screws 34 tapped into the spaced lugs 35 upon the under side of the work-plate 36 and affording fulcra for the latter. Set nuts 34 are provided for securing the fulcrum-screws in position. Near its fulcrum point, the workplate 36 is suitably apertured to receive the throat-plate 37 formed with the inclined needle aperture 38 and secured in position by means of the screws 39.

Near its upper or innerend, and at one edge, the work-plate has secured thereon by means of screws 40 the fulcrum-plate 41 formed with the rigid fulcrum-pin 42 having axial sockets therein. The said sockets are entered by the points of the center-screws 43 tapped into the spaced ears 44 of the yoke 45 formed at one end of the presser-fo'ot shank 47 to which is secured by means of the fastening screws 48 the pressure plate 49 having its I forward portion 50 slightly inclined to the body portion and provided with the needle aperture 51 having one of its walls 51" beveled to afiord clearance for the needle towhose path of reciprocation the member 50 is inclined. The stud 42 is shown embraced by a spring 52 having one arm 53 in engagement with the fulcrum-plate 41 and another arm 54 resting against the yoke 45 by means of which the presser foot is 'normally pressed toward the upper extremity of the work-plate.

The forward extremity of the presser-foot shank 47 is formed with an upturned lug 55 having an 'inclined edge 56 upon which rests the boss 67 upon the top of the head 4 of l the bracket-arm. The presser-bar has fixed thereon the rearwardly extending arm 68 adapted to be engaged by the forward extremity 69 of the 'presser-bar lifting lever 70 fulcrumed upon the rearward side of the bracket-arm 3 and operated inthe usual manner. When the presser-bar is lifted, the presser-foot rises under the action of its respective spring in a direction inclined to the presser-bar and substantially parallel with the face of the work-support, and when the presser-bar is released the action of the pressure spring 62 thereon serves to press' the bearing plate 57 forcibly against the relatively inclined edge 56 of the lug 55 with a wedge-like action to forcibly press the notched operative portion of the pressure plate 49 against the work resting upon the work-plate.

The member 29 .of the horn 2 is shown provided on itsunder side with an extension 29 which is embraced by the yoke 71 at the forward end of the tilting frame 72 formed at one side and rearward of the horn 2 with an upright standard 73 having an upwardly inclined split socket 74 with 'the clampscrews 75. The yoke 71 is hung from the member 29" by means of the pivotal centerscrews 76 provided with set-nuts 77 and carries at its rearward extremity the adjusting push-screws 78 whose points rest against the under side of the horn 2 while the intermediate pull-screw 79 is tapped into the horn 2. By means of the screws 78 and 79,

the inclination of the frame 72 relatively to thehorn 2 may be adjusted.

The forward end of the frame 72 'is provided with the spaced lugs 80 carrying the center-screws 81. entering sockets in the cross-member 82 of a tubular bar 83 in which is secured by means of the set-screw 84 one end portion of a rod .85 pivotally secured by-means of the pin 86 between the lugs 87 upon the underside and near,the lower end of the work-plate 36. By loosening the set-screw 84, the inclination ofthe work-plate relatively to the needle may oh the frame? 2 v Loosely embracing thelower. portion of -the' work-plate,

'barnow causes the thrustof face' of the .;ing of the nisaesi viously be 'zuijusted through the lengtheninfg or shortening of the" extensible brace a forded bythe members 83 and 85 between and the work-plate.

and adjustably secured thereon by means of the set-screw 88 is the tubular slide-block89 carrying the thrustplate 99 disposed'at right angles to the face of the work-plateand having'its upper face serrated to receive the lower end of the object to be stitched as represented in Fig. 1. The thrust-plate 90-"is adjustabletoward and from the needle and the Presser-foot to ac commodate articles of difl'erent sizes and serves to sustain the latter in opposition to the" thrust imposed thereon by the presserfoot in thestitching operation.

In the use of the machine, as thus far described, the article ,a to be stitched, whose component pieces of material are temporarily secured upon the wooden block or last b, is placed upon the work-plate with ltslower end resting against the thrust plate 90 which latter is. so adjusted that;

the needle will pass through the marginal portions of material at the utpper corner without enteringthe interior 0 the article, the inclination of the work-plate having been previously adjusted to the desired angle and-the presser-foot having been permitted to assume retractedposition under the action ofitsspringby-the liftingof the presser-bar. The lowering of/the presserv the pressure spring 62 to be transmitted to the presserfoot which presses the overlapping end of the-receptacle upon the. abutting side member, after which the-machine is set in mo tion. In the stitching operation, the needle applies the stitches at an inclination to both the adjoining faces of the lasted object to which it imparts a step-by-step feeding movement in which it is accurately guided by the thrust-plate 90 engaging its opposite end, theoperator merely turning the object as the stitching reaches the end of each flat same preparatory to the stitchsucceeding edge, in case the stitching is to be carried around one or more of thegcorners of the object. By lifting the bearing which enter suitable apertures 1n the ends I presser-bar, the presser-foot is permitted to disengage itself from the work which then may be readily removed.

.xFor stitching of boxes or other objects not having flat faces to slide along the thrust-plate 90, additional-[means are provided for cooperation with the work-plate and presser-foot above described. r In the socket 74 of the standard 73 is adjustably secured the upwardly inclined bar 9l to whose upper end issecured'the boss 92 of a bracket 93 having the spaced lugs 94 carrying center-screws 95 of the member 96 ofa swinging arm 97" formed with a split socket 98 in which is adjustably secured by means of the clampscrew. 99 one end of a thrust-bar 100 whose opposite end is provided with the journalpin 101 upon which is mounted the roller 102. The arm 97 isv formed with a lug 97' carrying the adjustable stop-screw 103 whose point is'adapted to engage a iseat 10 1: upon the boss 92 when the thrust-bar 100 is in operative position.

When the adjustable thrust-plate 90'is in use, the thrust-bar 100 may be turned upon its center-screws 95 upw rclly into inopera tive position, as represented in Figs. 1 and- 2.;- 'but when the thrust-plate is sufiiciently retracted, the thrust-bar 100 may be" swung downwardly into operative position at substantially' a right angle with the work stitched, which has previously had its come vponentipieces of material secured in proper relation by tacking or otherwise, is placed upon 4 with the roller 102 entering the angle between its side and end is then swung-into operative position'to enable the end of the object to rest upon" the inclined work-plate adjacent the path of the needle. The position of the bar 100 is then properly adjusted by adjusting the position of the samein its socket 98 and that of the bar 91 both circularly and endwise in its respective socket, after which the resser-bar is lowered and the stitching mechanism set in operation. In this adjustment of the device, ments of the needle and the guiding action of the roller 102 serve to impart to the article step-by-step rotary movements to accurately apply the stitches around the corner of the same without special attention on the part of the operator. As the bar 100 is laterally offset from the supporting bar 91 by means' of the swinging arm 97, it will be seen that the circular adjustment of the bar 91 in its split socket 74 will effect a lateral Jadjustment of the position of the bar 100 to'ward or from the stitching point and in 'a direction substantially lengthwise of the work-plate 36.

It-will be observed that each of the described thrust-sustaining members is capable of adjustment plate to accommodate different classes of work and is also adjustable with the workplate to determine its angular relation with the direction of thrust of the needle While the presser-foot is herein shown the outer extremity of the thrust-bar the feeding movewalls, and the bar L in a direction lengthwise, ;or substantially lengthwise of the workpect the present invention is-not limited to the particular manner in -which the presser-foot is sustained in relation to the work-plate, so long as it is capable of applying pressure to the work in a direction substantially parallel with the operative face of the work-plate.

Having thus set forth the nature of the invention, what I claim herein is:-

l. In a sewing machine, the combination with stitch-forming mechanism, of a workplate, a spring-pressed resser-bar movable toward and from said work-plate, a presserfoot disposed above the work-plate, said presser-foot being movable angularly with respect to the resser-bar and adapted to transmit the thrust of the presser-bar in a plane substantially parallel with the Workplate, and means for h lding the. work against lateral displaceme t under the action of the presser-foot. Y

2. In a sewing machine, the combination with stitch-forming mechanism, of aworkplate, a spring-pressed presser-bar movable toward and from said work-plate, and a presser-foot mounted independently of and movable in a direction in angular relation with said presser-bar and adapted to trans mit to thework sustained by the work-plate the thrust of the presser-bar.

3. In a sewing machine, the combination with stitch-forming mechanism, of a work' plate, a spring-pressed presser-bar movable toward and from said work-plate, a presserfoot mounted independently of and movable relatively to said presser-b'ar and adapted to transmit to the work sustained by the work plate the thrust of the presser-bar, and a spring applied to the presser-foot and acting thereon in opposition to the thrust of the presser-bar.

4. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, of a work-plate, meansfor adjusting the angular relation of said Work-plate with the needle, a presser-foot movably mounted upon said work-plate, and means sustained independently of the workplate for pressing said presser-foot against the work sustained by the Work-plate.

5. In a sewing machine, the combination with stitch-formingmechanism including a needle, of a work-plate inclined to said needle, a presser-foot movable substantially parallel with the face thereof, and springactuated means applied to the resser-foot for pressing it against the wor sustained by said work-plate.

6. In a sewing machine, the combination with stitch-forming mechanism, of a workplate, a resser-foot mounted thereon .and movable substantially parallel with .the face find spring-actuated means applied I tained at an acute angle with said needle, a 4

presser-foot movable substantially parallel with the face thereof, spring-actuated means applied to the resser-foot for pressing it against the wor sustained by said workplate, and means adapted for engagement with the work to sustain thethrust of the presser-foot thereon.

8. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, of a wbrk-plate disposed at an inclination to said needle, a spring-pressed presser-bar arranged substantially parallel with the needle, and a presser-foot movable substantially parallel with the face of the work-plateand adapted to transmit to the work sustained by the work-plate the thrust of the presser-barl 9. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, ofa'work-plate disposed at an inclination to said needle and provided with means for adjustment of the degree of such inclination, a resser-foot movable substantially parallel wlth the face of said work-plate, spring-actuated means applied to the resser-foot for pressing it against the work sustained by said workplate, and work-engaging means adjustable correspondingly w1th said work-plate for means for receiving the the work. 10. In a sewing machine, the combination with stitch-forming mechanism including a' reciprocating needle, of a work-plate dis posedat an inclination to said needle and thrust of the presser-foot upon provided with means'for adjustment of the degree of such' 'inclination, a) resser-foot movable substantially parallel w1th the face of said work-plate, spring-actuated meansapplied tothe f resserfoot for pressing it against the wor sustained by saidworkplate, and work-engaging means sustained by and adjustable with said worklate for ,receiving the thrust of the presseroot upon the work. p 11. In a sewing machine, the combination with stitch-forming mechanism including a tained at an inclination with said needle :1 name to this specification, in the, presence swinging gresser-footii a--fulcrum therefor of two subscribing witnesses sustained y said wor -plate in angular relation with its operative face, and spring- I OTIS v5 actuated means for pressing the resser-foot; Witnesses:

against the work. HENRY J. MILLER,

In testimony whereof, I have signed my HENRY A. KORNEMANN, Jr. 

